Classification of Chladniite |
| IMA status: | Approved 1993 |
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| Strunz 8th edition ID: | 7/A.08-05
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| Nickel-Strunz 10th (pending) edition ID: | 8.AC.50
8 : PHOSPHATES, ARSENATES, VANADATES A : Phosphates, etc. without additional anions, without H2O C : With medium-sized and large cations |
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| Dana 7th edition ID: | 38.2.9.3 |
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| Dana 8th edition ID: | 38.2.5.3
38 : ANHYDROUS NORMAL PHOSPHATES, ARSENATES, AND VANADATES 2 : (AB)5(XO4)3 |
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| mindat.org URL: | http://www.mindat.org/min-1008.html Please feel free to link to this page. |
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Type Occurrence of Chladniite |
| Type Locality: | Carlton meteorite, Carlton, Hamilton Co., Texas, USA |
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| Place of Conservation of Type Material: | Smithsonian |
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| Year of Discovery: | 1994 |
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Occurrences of Chladniite |
| Geological Setting: | Iron and primitive achondrite meteorites |
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Physical Properties of Chladniite |
| Lustre: | Vitreous, Resinous |
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| Diaphaneity (Transparency): | Transparent |
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| Colour: | Colourless |
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| Streak: | White |
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| Hardness (Mohs): | 4½ - 5 |
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| Cleavage: | Imperfect/Fair Rhombohedral |
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| Fracture: | Irregular/Uneven |
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| Density (calculated): | 3.017(2) g/cm3 |
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Crystallography of Chladniite |
| Crystal System: | Trigonal |
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| Class (H-M): | 3 - Rhombohedral |
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| Space Group: | R3 |
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| Cell Parameters: | a = 14.967(2) Å, c = 42.595(4) Å
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| Ratio: | a:c = 1 : 2.846 |
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| Unit Cell Volume: | V 8,263.40 ų (Calculated from Unit Cell) |
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| Z: | 18 |
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| Morphology: | Rims around other phosphates and silicates |
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Optical Data of Chladniite |
| Type: | Uniaxial (-) |
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| RI values: | nω = 1.620 nε = 1.600 |
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| Birefringence: | Weak |
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| Maximum Birefringence: | δ = 0.020
 Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration. |
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| Surface Relief: | Moderate |
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| Type: | Anisotropic |
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| Anisotropism: | weak |
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| Colour in reflected light: | Gray |
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| Internal Reflections: | orange-brown |
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Chemical Properties of Chladniite |
| Formula: | | {Ca}{Na | | }{Ca | | Na | | }{(Mg,Fe | | ) | | }[PO | | ] | | |
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| Essential elements: | Ca, Mg, Na, O, P |
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| All elements listed in formula: | Ca, Fe, Mg, Na, O, P |
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| Common Impurities: | Fe,Mn,Si |
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Relationship of Chladniite to other Species |
| Common Associates: | |
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Related Minerals - Nickel-Strunz Grouping):
- + | |
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Related Minerals - Dana Grouping):
- + | |
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Other Names for Chladniite |
| Synonyms: | |
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| Other Languages: | |
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Other Information |
| Health Warning: | No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care. |
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References for Chladniite |
| Reference List: | New Minerals (1997), New Minerals 1990-1994.
American Mineralogist: 79: 375-380. |
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Internet Links for Chladniite |
| Search Engines: |
Look for Chladniite on Google
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| External Links: | Look for Chladniite on WebmineralLook for Chladniite on Athena MineralogyLook for Chladniite on WikipediaLook for Chladniite on Mineralien AtlasRaman and XRD data at RRUFF projectAmerican Mineralogist Crystal Structure DatabaseSearch for Chladniite in the Natural History Museum (London) online catalogueChladniite details from Handbook of Mineralogy (PDF) |
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Localities for Chladniite |